The HR=0.7, with a median survival of 10 months for group 2, two sided at alpha=0.05, accural period = 12 months, follow up = 12 months and no loss to follow up with unequal allocation of 1:2. I'm trying to determine the n total of patients with power of 0.8 and 0.9 however I get equal allocation sample size values of 372 and 498. Is this the code to use? proc power; twosamplesurvivaltest=logrank sides=2 alpha=0.05 power=0.8 0.9hazardratio=0.7 refsurvival="control" curve("control")=(10):(0.5) accrualtime= 24 followuptime=12 groupweights=(1 2) ntotal =.; run;